关于oneself和one's own的问题

问题描述:

关于oneself和one's own的问题
Some people have pools of ____ in their yards.
A.themselves B.their own C.theirs own D.their own's
我选的是A,

oneself: 反身代词,强调句子主语发出的动作的承受者就是主语"自身",即主语本身就是动作的承受者.
如:The little child cannot look after himself. 这小孩不能自己照顾自己.
one's own 属于句子主语的或思想范畴内的东西
He cut his own hand.他割了自己的手.
题中是要表达属于自己的游泳池,所以用of one's own那of oneself 有这种说法吗?怎么用